Paper bottle cap



Dec. 26, 1939. D. BENSEL Y 2,184,369 *PAPER BOTTLE CAP Filed Dec.` 9, 1956 Patented Dec. 26, 1939 UNITED STATES PATENT OFFICE PAPER BOTTLE CAP York, N. Y.

Application December 9, 1936, -Serial No. 114,897

11 Claims.

, 'The present inventionrelates to an improvement in bottle caps, preferably made of paper, and is especially adapted` to form a temporary closure for milk and cream bottles, although not necessarily limited thereto.

Amongst the main objects of the present improvement is inthe provision of a paper cap which is leak-proof, is arranged to embrace the bottlm mouth or pouring zone thereof, thereby if.) to keep the same sanitary and clean.

Further objects are to eliminate the so-called` paper disc seal and the cost thereof, and to provide means in the cap whereby to develope an openable, extended pouring spout, which is lclos- 15 able, when not in use, to protect the unused contents in the bottle, and which cap may be discarded when the 'bottle is empty.

In bottle closing position on a bottle, the 'present device forms a liquid tight seal, is easily con- 20 verted to a pouring device and is easily removed from the bottle, and is easily and readily applied to a bottlefto seal the same.

Theforegoing, and other advantages and functions will be readily ascertained as the herein 2 description proceeds and it will be obviousthat modications may be made in the structure herein, without departingI from the spirit hereof or the scope of the appended claims.

ln the drawing, I

30 Fig. 1 is a plan view of the cap as sealed;

Fig. 2 is a view similar to Fig. 1,- with the cap shown' in the rst step of convertingit into a pouring spout;

Fig. 3 is a side view of the cap converted into a. pouring spout shown on a fragmented bottle neck; f

Fig. -4 is a sectional view taken on the line 4 4, Fig. 1, looking in the direction of the ar-` rows;

40 Fig. 5 is a reduced size layout of the bottle cap blank; c

Fig. 6 is a fragmentary view, in elevation, showing a Steppin sealing the bottle cap;

Fig. 7 is a plan view of the cap showing the positions of the coacting parts thereof when being ing, adjacent skirt section 24, I and 3, respectively, all .of the skirt sections being Adefined from their respective main sections by a common score line l, and each of the skirt sections is slitted from one another by cut scores i, y' and k, the slits ending at the score line l.

The independent skirt sections, further, are corrugated transversely of the blank as at I6, I6, Figs. 5 and 8, the corrugations, or crimping, ending at the score line Z.

The main section 6 has two substantially triangularsub-sections I 9 and I I, these being dened from section` 6 ,by diagonal score lines b and c, respectively, which commence at ythe lower opposite corners of section'6,at the score line Z, and merge into. an apex at the mid-portion 'of section 6 at its outer edge. Section 5 is likewise provided with triangular sub-sectionsIZ and I3 dened by diagonal score lines ,f and g which run the same as described for lines b and c'.

Triangular sub-sections I and I3 have their exposedv edges extending beyond' the main edge Il of the blank, these extensions being in the form of curved tongues T T, and act as tuckv and lock flaps, as will be later described in detail.

rIhe main section B is provided with an -extension I4, these sections and I4 forming a top .covering flap, when in bottle sealing position, and also form, in part, a portion of the pouring spout or extension as will be later described. The .v

sections 8-4 has a short line of weakened resistance I5, Fig. 5, which enters at the mid portions of said sections and ends at the center of thev combined sections. The purpose of the weakened line I will be later. described.

The main sections 8-I4 is also provided with triangular sections 27 and 28, these being defined froml said sections by angularly disposed score lines n and 0', said score linesbeing at an angle to the weakened line of resistance I5, whereby when'said line I5 is ruptured, flaps 21 and 28 may then be bent upwardly and rearwardly on said scores n and o, for purposes to be later described.

To erect the blank into a bottle'cap sealing structure, the glue lap 9 is touched with glue, as indicated by the stippling thereon, and the blank is then folded on the score lines a, d, e and h and the lap 9 is attached tothe inside face of panel 'I at I8, Fig. 7, thus forming, in this rst step, a rectangular tube.

The one piece tube thus: formed comprises a cap forming or sealing portion, the component parts of which are connected to one another, and a crimped bottle neck embracing or skirt portion,

tions 8-I4 and 'I are opposite one another, as

shown in Fig. '7.

The bending inwardly of sub-sections 5 and 6, due to their scored connections to the next adjacentsubsections I2 and I3 and sub-sections I0 and I I, respectively, draw these sections inwardly also, and the sub-sections I'Ilfll and I2-I3 due to their scored connections with the main sections 'I and B-fll also draw these latter inwardly and downwardly, in part indicated in Figs. 6 and 7. Thus, when finally closed down flat, the triangular sub-sections 5 and 6 lie lowermost, with the tabs T tucked in between sub-flaps II-I2 and main flap 8, triangular sub-sections ID--II and I2-l3 lie upon sub-sections 5 and 6 in the next plane, main section 1 lies upon subsections I0 and I3 in the next higher plane andcover or cap section 8--I4 overlies theentire folded structure in the highest or top plane. The section I4 is glued to section I` on nal closure, andrthis locks the folded structure in close, compact .l assembly.

After the glued cap folded assembly has beenk set, the cap is embossed in a die to Iform a cir` cular indent therein as shown at 20 in Figs. l to 4 inclusive.

the inner edge of the mouth of the bottle 2l as at 22 Fig. 4, when in operative sealing position. This embossing operation, due to the pressure forces used, further compacts the over-folded cap forming parts into a substantially liquid tight assembly. f When the cap has thus been folded and embossed, it may be coated with a liquid proofing coating thereby torender' the cap leak and moisture proof and, seal up all crevices between the folded sections'.

The cap is then ready to be affixed to a bottle, which is done by seatingit firmly upon the bottle mouth, and gathering in the corrugated skirt forming portions about the cylindrical neck and bead portions 2l` Yand 24, Figs. 3 and 4, whereby the four skirt members I, 2, 3 and 4 arev caused to overlap on their corners as indicated at 25, Fig. 3, and by reason of the crimping I6, the skirt members are easilyvconformable tothe contour of the bottle neck below 'the bead 24, as at 26, Fig. 4, after which a ductile metal ring, not shown, but which is current practice, is crimped upon the skirt at a point 26, below the bottle mouth bead, Figs. 3 and 4, thus to bind the cap to the bottle.

The gathering of the skirt as it depends from the rectangular cap forming portion, to embrace the cylindrical bottle neck, does not alect the contour of the rectangular cap pouring portion,

as is illustrated in Figs. l and 2, as the crimping of the skirt elements I and 4 inclusive breaks down the fibres `of that portion of the cap and renders it pliable and easily conformable to the exterior portions of the bottleneck, without undue strain upon the rectangular portions of the seal.

To open the sealfor pouring purposes, the seal This indent is of such dimensional proportions as will effectively contact with marsan ruptured, the diagonal sub-sections 21 and 28 are then bent upwardly as in Fig. 2, and backwardly on their score lines n and o, bending up,

simultaneously the under triangular sub-sections `position to close the cap.

The spout may be opened and closed as often as is required to empty `the bottle, and then removed to clean the bottle for reuse, and for receiving thereon a new sealing cap.

From the foregoing it will be noted that the pouring cap, as applied sealed to the bottle is substantially flat with no'extrusions above thetop, is easily iced on top by reason of the indent 20, and forms a good firm grip for manually handling of the bottles.

' What l claimis:

1. The combination with a bottle having a beaded mouth portion, of a paper sealing cap, said cap comprising a bottle mouth sealing portion and a skirted bottleneck engaging portion depending from said sealing portion, said sealing `portion comprising a plurality of ,infolded, connected and scored overlapping plies of material,

some. of said plies having interlocks to engage between other plies, others of said plies being scored to form a pull-out pouring spout, the outermost ply of the sealing means having a rupturable line of weakness therein above the spout forming elements whereby, after rupturing said line, said spout forming elements may be drawn out to form a spout.

2. A closure for a bottle having a cylindrical nec-k and a mouth bead, comprising a cap of stiff paper' including four laterally, joined sections having four crimped elements extending therefrom and forming a skirt and seal, the lower parts of said elements being engageable against the cylindrical neck below the bead; said sections being folded inwardly and providing a rectangular sealing top, said top having its transverse minor diameters substantially equal to the diameter of the bead at its top; said sections including under a half of, one of said minor n diameters a folded member, a top member over the rst member and having a weakened lineV coinciding with said, half, whereby a finger of a user may be rested on said bead to press up'the outer member and tear said line, so that the under member may then be pulled out to form a pouring spout.

3. The combination with a beaded mouth bottle of a paper sealing cap comprising a rectangular mouth `sealing portion and a relatively exible skirt portion joined thereto, said skirt portion being conformed to the contour of the bottle mouth at and below the said bead, and means for holding said cap and skirt in operative position on said bottle mouth, said rectangular sealing portion comprising a plurality of scored portions, which are overfolded upon one another to form a plural ply sealing portion, said overfolded portions being embossed with a central indent to compact the plural plies and a rupturable line of weakness on the outermost ply of the sealing portion.

4. A paper sealing cap for a bottle having a beaded mouth, said cap comprising a stiff topsealing-wall bounded by score lines; and a flexible skirt portion joined to the top wall at said score lines and conformed to the bottle neck below the bead; said skirt portion having slits extending downwardly from the top wall and di viding the skirt portion into sections adapted to be overlapped when the skirt is conformed to the neck; saidsections being crimped to form the non-overlapping corrugations extending downwardly from the Wall to render the skirt portion freely exible in all directions to conform to the bottle neck and to each other at the overlap.

5. A paper sealing cap for a bottle having e.

neck having a beaded mouth, said cap comprising a square top sealing Wall bounded by straight score lines and comprising superposed plies; and a exible skirt portion joined to the top wall at said score lines and conformed' to the bottle neck below the bead; said skirt portion having slits extending downwardly from the top wall and dividing the skirt portion into sections adapted to be overlapped when the skirt is conformed to the neck; said sections being crimped to form fine corrugations extending downwardlyfrom the wall to render the sections freely flexile in all directions to conform tothe bottle neck and to each other at the overlap, all'parts of each section being of a single thickness.

6. A paper sealing cap for a bottle having a beaded mouth, said cap comprising a top Wall comprising superposed plies; and, skirt portion joined to the top wall and adapted to engage the bottle neck below the bead; the outer most ply being provided witha rupturable line; an-

other of the plies being folded to form a pull,-

out pouring spout beneath said line and adapted to be extended to pouring position when said line is ruptured.

7. A paper sealing cap for a .bottle having a beaded mouth, said cap comprising a rectangular top sealing wall comprising superposed plies and bounded by score lines; and a flexible skirt portion joined tothe top wall at said score lines` and adapted to be conformed to the bottle neck below the bead; the outermost of said plies being portions joined to the top wall at said Gscore lines an outer ply being joined to a side portion atone of said score lines and provided with a rupturable line another of the plies beingv joined to another of the side portions at another of said score lines and being folded to form a pull-out pouring spout having adjacent edges longitudnal to and beneath said rupturable line,'said spout being adapted to be extended to pouring position when said line is ruptured.

9. In a combination as in claim 8, one o said adjacent edges being formed withA a tongue adapted to he projectedat said weakened line vwhen ruptured, .whereby said spout may be drawn out.

10. A paper sealing cap'for 'a bottle having a beaded mouth, said cap comprising a rectangular top sealing wall comprising superposed plies and bounded by score lines; and a exible skirt por-` tion joined to the top wall at said score lines and adapted to be conformed to the bottle neck below the bead; the outermost ply being joined to the skirt at one oi said scorelines and provided with a. rupturable line; another of the plies being joined to the skirt at another of said score lines and being folded to form a pull-out pouring spout having adjacent edges longitudinal to and beneath said rupturable line, said spout being adapted to be extended to pouring position when said line is ruptured; one of said adjacent edges being formed with a tongue adapted to be projected at said weakened line when ruptured, whereby said spout may be drawn out. v i.

11. A paper sealing cap for a bottle having a beaded mouth, said cap comprising a top sealing wall comprising superposed plies; and a flexible skirt portion joined to the top wall and adapted to conform to the bottle neck below the bead; I

the outermost ply being provided with a rupturable line; an inner ply beneath said line being folded'to form a pull-out pouring spout held. in

place by said outer ply and adapted to be extended to pouring position when said line is mptured; said skirt portion having slits extending downwardly from the top wall and dividing the skirt portion into sections joining respective plies and adapted to be overlapped when the skirt is conformed to the neck; said sections being crimped to form ne corrugations extending downwardly from the top wall to render the sections separatelyv exible to conform to the bottle neck and to each other at the overlap. A 

